<?php echo link_to(
                image_tag('module_change.png')
                , 'tree/selectmodule?id=' . $tree->getId()
                , array(
                    'confirm' => __('Are you sure?!')
                    , 'border' => '0'
                    , 'alt' => __('Select module')
                    , 'title' => __('Select module')
                )
            ) ?>
